[PATCH] io_uring: don't free request to slab

[Hao Xu <haoxu@linux.alibaba.com>]

It's not neccessary to free the request back to slab when we fail to
get sqe, just update state->free_reqs pointer.

Signed-off-by: Hao Xu <haoxu@linux.alibaba.com>
---
 fs/io_uring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 74b606990d7e..ce66a9ce2b43 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6899,7 +6899,7 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr)
 		}
 		sqe = io_get_sqe(ctx);
 		if (unlikely(!sqe)) {
-			kmem_cache_free(req_cachep, req);
+			ctx->submit_state.free_reqs++;
 			break;
 		}
 		/* will complete beyond this point, count as submitted */
-- 
2.24.4